o QO NATURAL HISTORY BULLETIN. 



(Seymour) and on S. cafillaia L. in Bohemia (Nora), so far 

 as one can be sure of the identification of the species by com- 

 parison of teleutospores alone. 



The names P. graminis foliorum stipcB Opiz (1852. Sez- 

 nam Rost. Kvet. Ceske, p. 138) and P. stipes Hora (1889. 

 Svdow's Ured. No. 28) are both nomina liuda. and according 

 to present usage are therefore to be excluded from the syn- 

 onymy. 



EXSIC. 

 Sydow, Uredineen, 28. 



Rabenhorst-Winter Puzschke, Fungi Europaei 3918. 

 Ellis and Everhart, N. A. F. 2245. 



28. Puccinia substerilis (E . & E '.) (1895. Bull. Torr., 

 Bot. CI., 22:58.) 



28a. On Stipa viridnla robusta Vasey. Hot Springs, N. M., Holway. 



Orig. Desc. "On Chrysopogon* sp. Fort Collins, Colo., March, 1894(0. 

 F. Baker, No. 219). 



Mostlv hvpophvllous, Sori (II. and III.) superficial, pulvinate, ellip- 

 tical, black-brown, l / 2 -i mm. long, naked. Uredospores echinulate, 

 globose or elliptical, 20-30X18-22//, brownish-black, epispore nearly 

 equally thickened throughout; pedicels slender, hyaline, subpersistent, 

 20-32// lon<4. Teleutospores (in the same sori as the uredospores), 

 oblong or clavate, pale, constricted at the septum, 22-30X12-15//, epi- 

 spore smooth, mostly not at all or only slightly thickened at the 

 rounded or subtruncate apex. 



The uredospores are abundant and well developed, while the teleuto- 

 spores are few in number and apparently not well matured." 



syn: 

 Uredo luxurians E. & E. (1898. North Amer. Fungi, 

 Cent, xxxvi, No. 3583.) 



II. Sori mostly epiphyllous, but also to some extent on the 

 leaf sheaths, and toward the base of the blade hypophyllous, 

 oblong or sometimes elongated, prominent, early naked, the 

 ruptured epidermis not especially noticeable, brownish-black; 

 uredospores elliptical to globular, sometimes obovate or sub- 

 triangular, 26-30 x 20-30 n, dark brown ; epispore thick, strongly 



*Examination of original material shows the host to have been Stipa 

 viridula Trim, and not a Chrysopogon. 



